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DISCRIMINATION OF INDIVIDUAL VOICES IN MALE GREAT BITTERNS (BOTAURUS STELLARIS) IN ITALY

2004; Oxford University Press; Volume: 121; Issue: 2 Linguagem: Inglês

10.1642/0004-8038(2004)121[0541

1938-4254

Luca Puglisi, Claudia Adamo,

Avian ecology and behavior

Recorded vocalizations from 18 known Great Bitterns (Botaurus stellaris) were analyzed, both quantitatively and qualitatively, to determine the amount of intra- and inter-individual variation. All parameters examined showed significant variation among males, and vocalizations of the same male were not stable over time. Variability within males over time makes re-identification of individuals on the basis of vocalizations difficult. The high degree of uncertainty in recognizing individuals limits the usefulness of vocalizations for censusing of bitterns.